Grand Cru Designer(s):  Johan Borst  First published:  2000  Derived from:  Rijndael  Key size(s):  128 bits  Block size(s):  128 bits  Structure:  Substitutionpermutation network  Rounds:  10    This article is about the block cipher. For the wine classification, see Grand cru.
In cryptography, Grand Cru is a block cipher invented in 2000 by Johan Borst. It was submitted to the NESSIE project, but was not selected. This article is about the block cipher. ...
In cryptography, the key size (alternatively key length) is a measure of the number of possible keys which can be used in a cipher. ...
In modern cryptography, symmetric key ciphers are generally divided into stream ciphers and block ciphers. ...
In cryptography, an SPnetwork, or substitutionpermutation network (SPN), is a series of linked mathematical operations used in block cipher algorithms such as AES. These networks consist of Sboxes and Pboxes that transform blocks of input bits into output bits. ...
Grand Cru is the highest level of classification of AOC wines from Burgundy or Alsace, those that come from a single vineyard. ...
The German Lorenz cipher machine, used in World War II for encryption of very highlevel general staff messages Cryptography (or cryptology; derived from Greek ÎºÏÏ…Ï€Ï„ÏŒÏ‚ kryptÃ³s hidden, and Î³ÏÎ¬Ï†ÎµÎ¹Î½ grÃ¡fein to write) is the study of message secrecy. ...
Encryption Decryption In cryptography, a block cipher is a symmetric key cipher which operates on fixedlength groups of bits, termed blocks, with an unvarying transformation. ...
NESSIE (New European Schemes for Signatures, Integrity and Encryption) was a European research project funded from 2000–2003 to identify secure cryptographic primitives. ...
Grand Cru is a 10round substitutionpermutation network based largely on Rijndael (or AES). It replaces a number of Rijndael's unkeyed operations with keydependent ones, in a way consistent with the security purposes of each operation. The intent is to produce a cipher at least as secure as Rijndael, and perhaps much more secure. The block size and key size are both 128 bits, and the key schedule is the same as Rijndael's. In cryptography, an SPnetwork, or substitutionpermutation network (SPN), is a series of linked mathematical operations used in block cipher algorithms such as AES. These networks consist of Sboxes and Pboxes that transform blocks of input bits into output bits. ...
This article is about the block cipher. ...
In modern cryptography, symmetric key ciphers are generally divided into stream ciphers and block ciphers. ...
In cryptography, the key size (alternatively key length) is a measure of the number of possible keys which can be used in a cipher. ...
The keyschedule of DES In cryptography, the algorithm for computing the subkeys for each round in a product cipher from the encryption (or decryption) key is called the key schedule. ...
This article or section is in need of attention from an expert on the subject. ...
Grand Cru is designed on the principle of multiple layered security. It is equivalent to a chain of 4 subciphers with independent keys, such that if 3 of the keys are known, the remaining cipher should still be secure.
References
 Security evaluation of NESSIE first phase (PDF)
